ACADEMY OF SCIENCES. 



173 



variety of T. melinus, Bdv. It is considerably smaller than melinus, being only 

 0.90 inch in expanse, while melinus measures 1.25 to 1.30 inch. The upper 

 side is similar to that of melinus, but the lower side is more silvery gray, with 

 the markings in the primaries utterly obliterated, and a distinct black line at 

 the base of the fringe. The markings of the secondaries are similar in out- 

 line to those of melinus, but they are extremely faint, and the anal orange 

 spot is almost obsolete, while the red bordering to the submarginal band, so 

 conspicuous in melinus, is here reduced to a few scattered scales. 



Contra Costa County. Hy. Edwards. June, 1875. 



Perhaps a long series of specimens will show the identity of T. melinus, 

 Bdv., and T. humuli, Harr., but in all the examples I have seen of the latter, 

 I miss the red scales bordering the submarginal band above alluded to. But 

 beyond this, I see no character by which they can be separated. 



Lyccena speciosa, n. sp. Hy. Edw. 



Pale silvery blue, the color of L. mellisa, Edw. Fringes, very broad, clear 

 white, cut very distinctly by black at the ends of the nervules. Underside, 

 pale silvery gray, with a very minute round black spot on the costa, and a 

 series of five round sub-marginal and one oblong central spots arranged almost 

 in circular form on the disc. There is also a distinct oblong discal spot, and 

 a smaller round one on the internal margin. The whole of the spots on the 

 primaries are comparatively large, very distinct, and jet black, without white 

 margins. The secondaries have one basal dot, a minute discal point, and a 

 sub-marginal row of seven small black spots, also without white margins. 

 Fringes, as in the upper side. Anterior, with the club unusually large, and 

 the shafts distinctly annulated with white. Thorax and abdomen, blackish 

 above, silvery beneath. 



Exp. of wings, 0.70 inches. 



Havilah, Kern County, R. H. Stretch. (1 $ Coll., Hy. Edw.) 



I should have hesitated to describe this exquisite species from a single 

 specimen, but the peculiar arrangement of the spots on tj^e lower side of the 

 primaries, its extremely small size, and the broad and distinctly black and 

 white fringes serve abundantly to distinguish it from any other form with 

 which I am acquainted. 



N. B. As I intend to devote a separate article to the species of Colias 

 proper, I have omitted all reference to that genus in the present paper. 



Professor Davidson read a continuation of his papers on Irri- 

 gation, describing the canal Cavour. 



The Committee on Nomination submitted the following re- 

 port : 



The Committee appointed to present a ticket of officers to the 

 Academy to be voted for at the coming election, beg to offer the 



